6533b7dafe1ef96bd126dec7

RESEARCH PRODUCT

Measurement of the top quark pair production cross section in pp collisions at sqrt(s) = 7 TeV in dilepton final states with ATLAS

Atlas CollaborationVasiliki MitsouLuca FioriniEduardo Ros MartínezJuan A. Fuster VerdúCarmen García GarcíaSusana Cabrera UrbánSalvador Martí GarcíaJosé Salt CairolsCarlos Lacasta LlácerJuan Antonio Valls FerrerMaría Victoria Castillo GiménezEmilio Higón RodríguezAntonio Ferrer SoriaSantiago González De La HozMohammed KaciYesenia Hernández JiménezMiguel Villaplana Pérez

subject

Nuclear TheoryHigh Energy Physics::PhenomenologyHigh Energy Physics::ExperimentFísica nuclearNuclear ExperimentPartícules (Física nuclear)

description

A measurement of the production cross section of top quark pairs (t (t) over bar) in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider is reported. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. Using a data sample corresponding to an integrated luminosity of 35 pb(-1), a t (t) over bar production cross section sigma(t (t) over bar) = 177 +/- 20(stat.) +/- 14(syst.) +/- 7(lum.) pb is measured for an assumed top quark mass of m(t) = 172.5 GeV. A second measurement requiring at least one jet identified as coming from a b quark yields a comparable result, demonstrating that the dilepton final states are consistent with being accompanied by b-quark jets. These measurements are in good agreement with Standard Model predictions.

yearjournalcountryeditionlanguage
2012-01-01
10.1016/j.physletb.2011.12.055http://hdl.handle.net/10550/36175